Gross tonnage – is defined by the measurement of the total internal capacity of the ship.
GT being determined by the formula:
GT = Ki V,
Ki = 0.2 + (0.02 Log 10V)
V = Total volume of all enclosed spaces in cubic metres.
Points to pounder for GT (Gross tonnage):
The numerical value of GT is always less than the numerical value of GRT (Gross registered tonnage)
- The means to calculate gross tonnage is laid out in the International Convention on Tonnage Measurement of Ships.
- Gross Tonnage is a measure of volume inside a vessel. This includes all areas from keel to funnel and bow to stern.
- Gross Tonnage is used to determine the number of crew, safety rules, registration fees, and port dues. It is the standard most often used to define a vessel.